Avengers: Age Of Ultron may be just around the corner but Robert Downey Jr and Chris Evans are currently prepping Captain America: Civil Warand the Iron Man star has teased some details about the third Cap movie.

Speaking to Empire, Downey Jr stressed that the focus will be on Steve Rogers, rather than Tony Stark, and that the billionaire genius playboy philanthropist won’t exactly be the villain.

He also dropped some hints about how Stark will go from distrusting authority of any kind to the kind of guy who would become the face of the superhero registration act. “The clues are in Ultron about where we might find him next, but what would it take for Tony to completely turn around everything he’s stood for, quote-unquote, because he was the right-wing guy who could still do his own thing. The idea of Tony being able to march into Washington and say, ‘I’ll sign up’, wouldn’t have made sense if the political climate in the real world hadn’t shifted the way it has. It’s a little bit of things following a real world continuum in, ‘What would you do?’ You have to figure, ‘Were you to ask the question, what would the American government do if this were real? Wouldn’t it be interesting to see Tony doing something you wouldn’t imagine?’”

Finally he teased that we might see a darker side to good ol’ Cap in Civil War. “I think Chris [Evans] has been hungry to bring even more of an underside and some shadow to that. I remember the comics – on the surface you got the sense that Cap was baseball and apple pie, but underneath there was all this churning stuff of being a man out of time. Now we know he’s made his peace with that. What’s the bigger issue? It can have a little something to do with the past, but it can be about someone becoming more modernised in their own conflict.”

Avengers: Age Of Ultron is released in UK cinemas 23 April. Captain America: Civil War is released in UK cinemas on 29 April 2016.For more on the comics that have inspired the film, pick up our 100 All-Time Greatest Comics bookazine now!